Nailing-machine



(N Model.)

A. KNOWLTON.

Nailng Iyachine.` Y No. 241,550. A Patented May 17,128'81.

z nlm'lm Il i unllmm llqg- N da@ X UNITED STATES PATENT OFFICE.

ALBION KNOWLTON, OF vBOSTON, MASSACHUSETTS, ASSIGNOR TO THE COR- RUGATED WIRE FASTENING COMPANY, OF HARTFORD, CONNECTICUT.

NAlLlNG-MACHINE.

SPECIFICATION forming part of `Letters Patent No. 241,550, dated May 17, 18851.

Application filed March 30, 1881.n (No model.)

To all whom it may concern Beit known that I, ALBION KNOWLTON, of Boston, in the county of Suffolk and State of Massachusetts,have invented certain Improvements in Nailing-Machines, of which the following is a full, clear, concise, and exact descrip'tion, reference being had to the accomi panying drawings, making part hereof, in

which- Figure lis a side elevation. Fig. 2 is a front elevation, partly in section. Fig. 3 is a section on linea x, Fig. 2. Fig. 4 is-a plan of cam F. Fig. 5 is a section on line y y, Fig. 4. Fig. 6 is an elevation of cam F. Figs. 7, 8,9, and l0 are details of the cam F. Fig. ll is adetail of faceplate covering the wire` groove shown in Fig. 2.

My invention relates t0 the means for feeding the wire in such a manner that the length 2o Of the Wire nail Or pegmaybereadilychanged;

and it consists, mainly, in an adjustable cam of a novel construction.

The parts not lettered in the drawings will be understood without description by all skilled z5 in this art, and are substantially the same as are fully described in Patent N o. 224,339, dated February l0, 1880.

The feed-wheel a for feeding the wire is fast to the shaft b. The other feed-wheel, a, is

3o journaled On spring V11', so that the wire is fed only When it is nipped between the two feedwheels a a', as described in the patent above named. Consequently, if spring b were not moved so as to carry feed-wheel al away from feed-wheel a, the wire would be fed continuously as long as shaft b revolved; but as soon as spring b and feed-wheel a are moved far enough to relieve the wire from the nip of the feed-wheels the wire is no longer fed forward, 4o but remains stationary. This motion Of the feed-wheel ct' is of course very slight, and need not be enough to unmesh the gear-teeth by which the feed-wheel ct drives the feed-wheel a from operative contact with the wire be- 4 5 tween it and the feed-wheel a.

Spring b rests upon lever d, as shown clearly in Fig. 2, and lever d is controlled by thelengthgaging'cam F, which is fast to the main shaft,

\ and which is so shaped as to keep the upper 5o end of lever d in the position shown in Fig. 2

during a certain part of the revolution of shaft b. During the rest of the revolution of the shaft the upper end of lever d is thrown and held nearer to the axis of shaft b, as will be well understood without further description.

. Were the cam F made in one piece, as in the patent above mentioned, the feed of the Wire could take place only when cam F did Ilot hold lever d in such a position as to prevent feed-wheel a from pressing the wire upon 6o feed-wheel a, and consequently the length of wire fed would be the same at each revolution of shaft b and cam F, (unless cam F were splinedupon shaft b and shaped and moved upon the shaft as in that patent.)

The present invention, then, consists, mainly, in making cam F in two partsone part,f, fast to the shaft, and the Otherpart,f, adjustable on part f in such a way as to increase or diminish the length of that part of the cam 7ov which acts to hold-feedwheel a out of operative contact with the wire, and thereby acts to prevent the feed ofthe Wire.

As shownin thedrawings, the cam is formed in two leaves,f and f. The hub offisfast to the shaft b, so that j' must move with that shaft. The other leaf, j", is secured to j' by anysuitable means (as, for instance, thelatch shown in Figs. 5 and 6) which will adm'it off being adjusted O11 f. To feed the maximum 8o length of wire pegs or nails the shoulder 1 of piece f is adjusted as far as possible from shoulder 2 ofA piece f', and vice versa to feed the minimum length. A scale can be readily 'engraved upon this cam, showing just where 85 to set piece f for any desired length of peg. The-carrier K is forced by spring It to the left and against the lower end of lever (1; butthe spring b' is the spring mainly relied upon to keep the cam-roll on the upper end of lever d 9o against the periphery of the cam.

What I claim as my invention is- In a nailing-machine, the adjustable can] F, formed of the two leaves ff', the leaf f being fast `to the shaft, and the leaf j" secured adjustably upon leaff, and operating substantially as described.

ALBION KNO WLTON.

Witnesses:

J. E. MAYNADIEE, JOHN R. SNOW. 

